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Home >> Suzuki >> 2007 >> XL7 Base, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine General Information And Diagnosis >> Diagnostic Information and Procedures >> DTC P0446 >> Circuit/System Testing

Circuit/System Testing

  1. Verify DTCs P0458, P0459, P0498, P0499, P0452, or P0453 are not set.
  2. Disconnect the purge line from the EVAP purge valve.
  3. Ignition ON, observe the fuel tank pressure sensor parameter with a scan tool. The FTP sensor parameter should be 0 inches H2O. If the pressure is not at 0 inches H2O, verify the FTP sensor voltage is less than 4.7 volts.
  4. Reconnect all previously disconnected EVAP hardware.
    NOTE: Refer to the J 41413-200 Evaporative Emissions System Tester (EEST) operation manual for detailed instructions.
  5. Remove the fuel fill cap and connect the GE-41415-50 to the fuel tank filler neck. Connect the J 41413-200 to the GE- 41415-50.
  6. Ignition ON, seal the EVAP system with a scan tool.
  7. Turn the nitrogen/smoke valve on the J 41413-200 to nitrogen.
    NOTE: DO NOT exceed the specified value in this step. Exceeding the specified value may produce incorrect test results.
  8. Use the remote switch to activate the J 41413-200 and pressurize the fuel tank with nitrogen to 5 inches H20.
  9. While observing the FTP sensor parameter with a scan tool, command the EVAP vent valve OFF. Verify the FTP Sensor parameter is 0 inches H2O.
    • If not at the specified value, test for a blockage or a restriction in the EVAP vent hose, or replace the EVAP vent solenoid valve.
  10. If the vehicle passes the Circuit/System Verification test, then operate the vehicle within the conditions for running the DTC. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records List.
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